Crestron C2VEQ-4, Руководство по эксплуатации и установке, Страница: 6 / 28

Volume/Equalizer Control Expansion Card Crestron C2VEQ-4
The treble and bass controls are independent from volume and are individually
controlled for each channel. Each channel includes a muting relay. When the signal
driving Mute1 goes high, the muting circuit is activated providing <-100dBV output
level from any volume level. Likewise, channels “2,” “3,”and “4” drive Mute2,
Mute3, and Mute4, respectively. When the muting signal goes low, the muting
circuit is deactivated and the volume and tone return to their original preset levels.
NOTE: MuteAll is an override. All channels are muted when this signal is high.
When it is low, the channels follow the state of Mute1, Mute2, Mute3, and Mute4.
Each of the four channels has a twelve-filter parametric equalizer that permits you to
correct for acoustical distortions in the listening area or in the speakers themselves,
and/or to establish preset values that enhance the sound conditions for favorite music
or recording media.
The 12 filters are identical in function. Each delivers up to 12dB of boost or cut
when using DAT software; from -36dB to +24dB in a SIMPL program. Each filter
also has an adjustable bandwidth control (from .02 octaves to 2 octaves), and a
center frequency control range from 10 Hz to 20 KHz. Use each filter anywhere in
the audio spectrum, not just pre-selected ranges as typically found on graphic
equalizers. In addition, you can select from among five filter types (low pass, high
pass, EQ filter, bass shelf, and treble shelf) or select no filter.
Each channel is equipped with protective relays that turn ON only after safe
conditions are sustained by the electronic circuitry. This feature protects the output
from “pops” caused by accidental power-down/power-up conditions to the
C2VEQ-4.
C2VEQ-4 Simplified Block Diagram
4 Input
X
4 Output
Mixer
12 Band
Eq
Volume &
Tone Control
Volume &
Tone Control
Volume &
Tone Control
Volume &
Tone Control
Ch 1
Ch 2
Ch 3
Ch 4
Ch 1
Ch 2
Ch 3
Ch 4
Line-Level
Audio Input
(Balanced or
Unbalanced)
Line-Level
Audio Output
(Balanced or
Unbalanced)
A/D
A/D
A/D
A/D
D/A
12 Band
Eq
12 Band
Eq
12 Band
Eq
Mute
Relay
D/A
D/A
D/A
Mute
Relay
Mute
Relay
Mute
Relay
2
•
Volume/Equalizer Control Expansion Card: C2VEQ-4 Operations & Installation Guide - DOC. 6136